[Greg McKaskle]

The attached image shows how to do it using a feedback node.

A feedback node is a very local variable that keeps the value from the last iteration. This allows execution N be based on the values of execution N-1.

Replace the button with the one you want to read, replace the 0.1 with the delta you want to add, and don't forget to connect the refnum to the joystick and motor VIs.

Ask questions if some portion of it doesn't make sense.

Greg McKaskle